Here are some ...: Are you trying to preserve sperms? If so, just do it for personal investigation - maybe under microscope, not for private insemination because of great concern of sanitation and sterilization. Regarding your Q, I speculate sperms will die within 4-12 hours depending on temperature, oxygenation, nutrition, sterilization, etc. inside the jar.
Answered 2/2/2020
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